1. Department of Pathology; Tianjin Medical University; Tianjin China
2. Department of Pathology; Tianjin Cancer Hospital; Tianjin Medical University; Tianjin China
3. Department of Pathology; Tianjin General Hospital; Tianjin Medical University; Tianjin China
4. Department of Maxillofacial and Otorhinolaryngology Head and Neck Surgery; Tianjin Medical University Cancer Institute and Hospital; Tianjin China